JP2014229915A - Intercom system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an intercom master unit to directly display or record photographed video by a camera of an intercom slave unit and a surveillance camera.SOLUTION: A surveillance camera 3 outputting a video signal based on a protocol in accordance with ONVIF is connected via a communication network 4. A slave CPU 15 transmits photographed video by a slave camera 14 on the basis of the protocol in accordance with ONVIF. A master CPU 26 displays a video signal on a display unit 24 if the master CPU 26 receives the video signal based on the protocol in accordance with ONVIF, thereby enabling displaying video of the surveillance camera 3 in addition to video of the slave unit camera 14 on the display unit 24. The slave unit 1 and the master unit 2 transmit and receive voice signals between them on the basis of SIP.

Description

  The present invention relates to an interphone system including an interphone slave unit having a call / call function, an interphone master unit having a call function, and a surveillance camera, and each device is connected via a communication network.

2. Description of the Related Art Conventionally, there are interphone systems that have a calling / calling function, interphone systems that have a monitoring camera in addition to an interphone master that has a calling function, and each device is connected via a communication network such as a LAN. In such an intercom system, the protocol of the video signal sent out by the surveillance camera and the protocol of the video signal sent out by the camera installed in the interphone slave unit are different, so the video captured by the surveillance camera can be viewed directly on the interphone master unit. Because it was not possible, a separate protocol conversion device was interposed.
For example, in the intercom system of Patent Document 1, a server corresponding to both protocols is provided to record the video of the surveillance camera on the server, or the server can convert the protocol to display the video on the intercom master unit.

JP 2012-15626 A

  However, in the configuration of the above-described Patent Document 1, in order to allow the captured video of the monitoring camera to be viewed on the interphone master unit, a server that is compatible with both the monitoring camera and the interphone device is required, which is expensive. It was a composition.

  Therefore, in view of such problems, the present invention provides an interphone system that allows images captured by the interphone slave camera and the surveillance camera to be directly displayed or recorded on the interphone master unit and does not require a separate protocol conversion device. The purpose is to do.

In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that an intercom handset provided with a function of calling a resident and making a call and a handset camera for imaging a visitor, and responding to a call from the interphone handset An interphone master unit having a function to perform and a display unit displaying a captured image of a slave camera, wherein the devices are connected via a communication network, and are connected via the communication network. The intercom slave unit has a video transmission unit that transmits the captured image of the slave unit camera based on the network camera protocol, and includes a monitoring camera that outputs a video signal based on the network camera protocol. The machine is equipped with a video control unit that displays the video signal based on the network camera protocol on the display unit. In addition to the image of the slave camera, the video of the surveillance camera can be displayed on the display unit, and the interphone slave unit and the interphone master unit transmit and receive audio signals based on the IP telephone protocol between each other. It has the part.
According to this configuration, the interphone slave unit transmits the video signal based on the network camera protocol common to the surveillance camera, and the interphone master unit receives the video signal based on the network camera protocol that can receive the surveillance camera video signal. Since the video is displayed on the display unit, the video captured by the surveillance camera can be directly displayed in addition to the video captured by the slave camera. Therefore, there is no need for a separate protocol conversion device or the like for displaying the video of the surveillance camera on the interphone master unit. In addition, since the transmission of the audio signal between the interphone slave unit and the interphone master unit is performed by the IP telephone protocol suitable for the interphone, a smooth call can be realized.

  The communication network is a WAN such as the Internet or a telephone network, or a LAN provided in a region such as a building. The network camera protocol is a protocol suitable for video transmission of a network camera compliant with ONVIF (Open Network Video Interface Forum) or PSIA (Physical Security Interoperability Alliance), and the IP phone protocol is SIP (Session Initiation). Protocol) and H.C. A protocol suitable for transmission of voice such as H.323.

According to a second aspect of the present invention, in the configuration according to the first aspect, the interphone master unit includes a recording unit that stores both the captured video of the surveillance camera and the captured video of the slave camera.
According to this configuration, the interphone master unit does not require a separate recording device for the monitoring camera because the recording unit records the captured image of the monitoring camera in addition to the captured image of the slave camera.

According to a third aspect of the present invention, in the configuration of the second aspect, the monitoring camera includes a human sensor that detects the approach of a person, and the monitoring camera transmits a captured image using a detection operation of the human sensor as a start trigger. The video control unit has a camera control unit to start, and the video control unit stores the captured video from the surveillance camera in the recording unit.
According to this configuration, for example, when a suspicious person approaches the monitoring camera, the monitoring camera is activated and recording is started. Therefore, when a suspicious person appears, recording can be performed reliably, and it is effective for security without always recording, The capacity of the recording unit can be reduced.

  According to the present invention, the interphone slave unit transmits the video signal based on the network camera protocol, and the interphone master unit displays the video signal on the display unit based on the network camera protocol. In addition to the video, the video captured by the surveillance camera can be displayed directly on the intercom master unit. Therefore, a separate protocol conversion device or the like for displaying the video of the surveillance camera is not required. Since the transmission of the audio signal between the interphone slave unit and the interphone master unit is performed by the IP telephone protocol suitable for the interphone, a smooth call can be realized.

It is a block diagram which shows an example of the intercom system which concerns on this invention, and has shown the circuit block diagram for each apparatus. It is a block diagram which shows the other example of an intercom system, and has shown each apparatus with the circuit block diagram.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of an intercom system according to the present invention, and shows individual devices in a circuit block diagram. Reference numeral 1 is an interphone slave unit for a visitor to call a resident (hereinafter simply referred to as “slave unit”), and 2 is an interphone master unit for responding to the call (hereinafter simply referred to as “master unit”). Reference numeral 3 denotes a monitoring camera for imaging a suspicious person or the like, and each device is connected via a communication network 4 constituted by a LAN or a WAN such as the Internet or a telephone network.

  The handset 1 includes a call button 11 for calling a resident or the like, a microphone 12 and a speaker 13 for calling, a handset camera 14 for capturing a visitor, a handset CPU 15 for controlling the handset 1, and a communication network. 4 and a slave unit communication IF 16 for communicating with the master unit 2 is provided.

  The base unit 2 includes a base unit operation unit 21 provided with a call button 21a for responding to a call, a microphone 22 and a speaker 23 for calling, a display unit for displaying an image transmitted from the handset 1, etc. 24, a recording unit 25 for recording video, a parent CPU 26 for controlling the parent device 2, a parent device communication IF 27 for connecting to the communication network 4 and communicating with the child device 1 and the monitoring camera 3, and the like.

  The surveillance camera 3 is a so-called network camera, and includes a camera 31, a camera CPU 32 that processes a captured image of the camera 31 and sends out a video signal, a camera communication IF 33 that connects to the communication network 4 and transmits a video signal, and the like. Yes. The camera CPU 32 establishes a link with the transmission destination based on the ONVIF protocol and transmits a video signal by multicast RTP (real-time transport protocol).

Here, a communication mode between the devices will be described. The slave unit 1 establishes a link with the transmission destination of the captured video of the slave unit camera 14 based on a protocol based on ONVIF under the control of the slave unit CPU 15 and transmits a video signal by multicast RTP. On the other hand, in the transmission / reception of the audio signal between the child device 1 and the parent device 2, the child device CPU 15 establishes a link with the parent device CPU 26 based on SIP, and performs the transmission / reception of the sound signal by unicast RTP.
Further, the master unit 2 receives a video signal from a partner (slave unit 1 and monitoring camera 3) linked based on a protocol based on ONVIF under the control of the master unit CPU. In addition, voice signals are transmitted to and received from the slave unit 1 by SIP.

The operation of the intercom system configured as described above is as follows. The surveillance camera 3 always performs imaging, that is, continues imaging for 24 hours, and transmits a video signal to the parent device 2. As described above, the camera CPU 32 establishes a link with the parent device 2 using a protocol compliant with ONVIF, and transmits the captured image of the camera 31 by multicast RTP. In the base unit 2 that has received the video signal from the monitoring camera 3, the video is recorded in the recording unit 25 under the control of the base unit CPU 26.
Note that the recording in the main unit 2 is also performed for 24 hours in accordance with the operation of the monitoring camera 3, and for example, the recording video having a capacity capable of recording for one week is deleted and overwritten in order from the recorded video after one week has passed. In addition, a captured image of the monitoring camera 3 can be displayed on the display unit 24 by a predetermined operation of the parent device operation unit 21.

  In this state, when a call is made by a visitor operating the call button 11 of the child device 1, a call signal by SIP is generated and transmitted to the parent device 2 under the control of the child device CPU 15. At the same time, the slave camera 14 is activated and starts transmitting a video signal. The video signal is transmitted by multicast RTP when a link with the base unit 2 is established by a protocol compliant with ONVIF.

In the base unit 2 that has received the video signal, the base unit CPU 26 displays the video on the display unit 24. In addition, in addition to the captured video of the monitoring camera 3, the captured video of the slave camera 14 is recorded in the recording unit 25.
Also, in the base unit 2 that has received a call signal and has established a link with the handset 1, a ringing tone is reported from the speaker 23 under the control of the base unit CPU 26, and a responder such as a resident responds to the call by receiving the call. When the button 21a is operated, a session is established between the child device 1 and the parent device 2. That is, a call path is formed and a SIP call is possible. In this way, a call is performed between a visitor who has performed a call and a resident who has performed a response, and voice signals are transmitted and received by unicast RTP.

Thereafter, when the call is finished and the call button 21a is operated again by the responder, the formed call path is disconnected. Using this call end as a trigger, handset CPU 15 ends the transmission of the video signal by RTP to base unit 2.
During this time, the video recording unit 25 records video transmitted from the surveillance camera 3 without interruption.

In this way, the slave unit 1 transmits a video signal based on a protocol common to the surveillance camera 3 compliant with ONVIF, and the master unit 2 receives it based on a protocol compliant with ONVIF that can receive the video of the surveillance camera 3. Since the displayed video is displayed on the display unit 24, in addition to the video captured by the slave camera 14, the video captured by the monitoring camera 3 can be directly displayed. Therefore, a separate protocol conversion device or the like for displaying the video of the monitoring camera 3 on the parent device 2 is not required. Moreover, since the transmission of the audio signal between the slave unit 1 and the master unit 2 is performed by the IP telephone protocol suitable for the interphone, a smooth call can be realized.
Further, since the base unit 2 can record the video captured by the monitoring camera 3 in addition to the video captured by the slave unit camera 14 in the recording unit 25, a separate recording device for the monitoring camera 3 is not required, so that the base unit 2 can be configured at low cost. .

Next, another example of the intercom system will be described. FIG. 2 is a configuration diagram showing another example, and is different from FIG. 1 described above in that the surveillance camera 3 includes a human sensor 34 to start imaging. In addition, about the component which is common in FIG. 1, the same code | symbol is provided and description is abbreviate | omitted. Hereinafter, the difference from FIG. 1 will be mainly described.
The surveillance camera 3 is in the standby state and in the off state. When the human sensor 34 detects the approach of a person, the camera 31 is activated by the control of the camera CPU 32 and transmission of the video signal is started.

The base unit 2 that has received this video signal records the video on the recording unit 25 under the control of the base unit CPU 26 and displays it on the display unit 24 according to the setting. Thereafter, when the person moves away from the monitoring camera 3 and the sense signal from the human sensor 34 disappears, the imaging of the camera 31 is stopped (transmission of the video signal is ended) and the standby state is restored.
In addition, since the operation from the occurrence of a call to the end of the call in this configuration is the same as that in the above embodiment, the description thereof is omitted.

  Thus, by providing the human sensor 34 in the monitoring camera 3, when a suspicious person or the like approaches, the monitoring camera 3 is activated and the video is transmitted to the master unit 2 and recorded by the recording unit 25. The capacity of the recording unit 25 can be reduced without dropping the image.

In the above embodiment, the transmission of the captured image of the monitoring camera 3 and the transmission of the captured image of the slave camera 14 are performed by multicast. This is because a plurality of transmission destinations are assumed. When the destination is a small number of devices as in the above-described form, it may be transmitted by unicast.
In addition, although a protocol conforming to ONVIF has been described as an example of a protocol suitable for a network camera, a protocol conforming to PSIA may be used as another protocol. Furthermore, although the voice signal is transmitted / received using SIP, the IP telephone protocol is suitable for a telephone call. H.323 may be used.

  1 .... Interphone slave unit, 2 .... Interphone master unit, 3 .... Monitoring camera, 4 .... Communication network, 14 .... Slave unit camera, 15 .... Slave unit CPU (Video signal transmitter, audio signal controller) , 24 .. Display unit, 25 .. Recording unit, 26 .. Master CPU (video control unit, audio signal control unit), 31 .. Camera, 32 .. Camera CPU (camera control unit), 34. Sensation sensor.

Claims (3)

Interphone handset equipped with a function for calling a resident and making a call, and a handset camera for photographing a visitor, a function for responding to a call from the interphone handset, and a display for displaying a captured image of the handset camera An interphone master unit having a unit, and an interphone system in which devices are connected via a communication network,
A surveillance camera connected via the communication network and outputting a video signal based on a network camera protocol;
The intercom slave unit has a video transmission unit that transmits a captured image of the slave unit camera based on a network camera protocol,
The intercom master unit includes a video control unit that displays the video signal based on the network camera protocol on the display unit, and displays the video of the monitoring camera on the display unit in addition to the video of the slave camera Made possible
Furthermore, the interphone slave unit and the interphone master unit have an audio signal control unit that transmits and receives an audio signal between each other based on an IP telephone protocol. 2. The interphone system according to claim 1, wherein the interphone master unit includes a recording unit that stores both the captured video of the monitoring camera and the captured video of the slave camera. The surveillance camera includes a human sensor for detecting the approach of a person,
The monitoring camera has a camera control unit that starts transmission of a captured image using a detection operation of the human sensor as a start trigger,
3. The intercom system according to claim 2, wherein the video control unit stores the captured video from the monitoring camera in the recording unit.

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